Could you hit ctrl-alt-del or required a hard reset?
How long did you what before rebooting? Wait at least 20 minutes to see what happens. If it does finishing booting in less than the above time I recommend looking for more current releases of initscripts and hal daemon.
Look here for newer rpm's. These are not fully tested but may work for you. I recommend you have backup of current rpm's of the rpms you try to upgrade to incase something goes wrong.
If not wishing to try the above then look over this part.
Are you upgraded the system? If so how? what repos?
Try dag repos whether using yum or synaptic.
Google the Linux way at ' http://www.google.com/linux